大约有 3,549 项符合查询结果(耗时:0.0308秒) [XML]

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How to catch SQLServer timeout exceptions

I need to specifically catch SQL server timeout exceptions so that they can be handled differently. I know I could catch the SqlException and then check if the message string Contains "Timeout" but was wondering if there is a better way to do it? ...
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SQL statement to get column type

Is there a SQL statement that can return the type of a column in a table? 22 Answers 2...
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How to calculate percentage with a SQL statement

I have a SQL Server table that contains users & their grades. For simplicity's sake, lets just say there are 2 columns - name & grade . So a typical row would be Name: "John Doe", Grade:"A". ...
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Escaping ampersand character in SQL string

I am trying to query a certain row by name in my sql database and it has an ampersand. I tried to set an escape character and then escape the ampersand, but for some reason this isn't working and I'm uncertain as to what exactly my problem is. ...
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What is the Oracle equivalent of SQL Server's IsNull() function?

In SQL Server we can type IsNull() to determine if a field is null. Is there an equivalent function in PL/SQL? 4 Answers...
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Restore a postgres backup file using the command line?

I'm new to postgresql, and locally, I use pgadmin3. On the remote server, however, I have no such luxury. 24 Answers ...
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How do I split a string so I can access item x?

Using SQL Server, how do I split a string so I can access item x? 44 Answers 44 ...
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When would I use XML instead of SQL? [closed]

...an the approach I've always used, which is storing all of my data in a (My)SQL database and then using PHP/Python/etc. to work with it on the web as needed. ...
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Using backticks around field names

After reading a couple of answers and comments on some SQL questions here, and also hearing that a friend of mine works at a place which has a policy which bans them, I'm wondering if there's anything wrong with using backticks around field names in MySQL. ...
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Correct use of Multimapping in Dapper

... I just ran a test that works fine: var sql = "select cast(1 as decimal) ProductId, 'a' ProductName, 'x' AccountOpened, cast(1 as decimal) CustomerId, 'name' CustomerName"; var item = connection.Query<ProductItem, Customer, ProductItem>(sql, (p, c) =>...